/*
 *  Copyright 2005 Blandware (http://www.blandware.com)
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package com.blandware.atleap.webapp.action.questionnaire.question;

import com.blandware.atleap.webapp.action.core.BaseAction;
import com.blandware.atleap.webapp.form.questionnaire.QuestionForm;
import com.blandware.atleap.webapp.util.core.LocaleUtil;
import com.blandware.atleap.webapp.util.core.WebappConstants;
import com.blandware.atleap.webapp.util.questionnaire.QuestionnaireModuleWebConstants;
import org.apache.commons.validator.GenericValidator;
import org.apache.oro.text.regex.MalformedPatternException;
import org.apache.oro.text.regex.Pattern;
import org.apache.oro.text.regex.PatternCompiler;
import org.apache.oro.text.regex.Perl5Compiler;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;
import org.apache.struts.action.ActionMessages;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.List;

/**
 * <p>Prepares form bean to create question title.</p>
 * <p><a href="CallCreateQuestionTitleAction.java.html"><i>View source</i></a></p>
 *
 * @author Roman Puchkovskiy <a href="mailto:roman.puchkovskiy@blandware.com">
 *         &lt;roman.puchkovskiy@blandware.com&gt;</a>
 * @version $Revision: 1.5 $ $Date: 2008/04/29 17:51:54 $
 * @struts.action path="/questionnaire/question/callCreateTitle"
 * input="inputForward"
 * name="questionForm"
 * scope="request"
 * validate="false"
 * roles="questionnaire-question-create"
 * @struts.action-forward name="inputForward"
 * path=".questionnaire.question.create"
 * @struts.action-forward name="createQuestionTitle"
 * path=".questionnaire.question.createTitle"
 * @struts.action-forward name="listQuestions"
 * path="/questionnaire/question/list.do"
 * redirect="true"
 */
public final class CallCreateQuestionTitleAction extends BaseAction {
	/**
	 * @param mapping  The ActionMapping used to select this instance
	 * @param form     The optional ActionForm bean for this request (if any)
	 * @param request  The HTTP request we are proceeding
	 * @param response The HTTP response we are creating
	 * @return an ActionForward instance describing where and how
	 *         control should be forwarded, or null if response
	 *         has already been completed
	 */
	public ActionForward execute(ActionMapping mapping, ActionForm form,
	                             HttpServletRequest request, HttpServletResponse response) throws Exception {

		request.getSession().removeAttribute(QuestionnaireModuleWebConstants.QUESTION_SUBMITTED_ACTION_KEY);

        request.setAttribute("validationRegexes", QuestionnaireModuleWebConstants.VALIDATION_REGEXES);

		if ( isCancelled(request) ) {
			return mapping.findForward("listQuestions");
		}
		QuestionForm questionForm = (QuestionForm) form;

		// Check whether user came here not from previous page (or he switched
		// edit mode/languge during creating questionnaire)
		String localesMode = questionForm.getLocalesMode();
		if ( !"current".equalsIgnoreCase(localesMode) && !"all".equalsIgnoreCase(localesMode) && questionForm.getTitleCheckedBoxes().size() == 0 ) {
			request.setAttribute("beginPage", mapping.findForward("listQuestions").getPath());
			return mapping.findForward("unsatisfiablePage");
		}

        String regex = questionForm.getValidationRegex();
        if (!GenericValidator.isBlankOrNull(regex)) {
            PatternCompiler compiler = new Perl5Compiler();
            boolean regexIsCorrect = true;
            try {
                Pattern pattern = compiler.compile(regex);
            } catch (MalformedPatternException e) {
                regexIsCorrect = false;
            }
            if (!regexIsCorrect) {
                ActionMessages errors = new ActionMessages();
                errors.add("incorrectRegex", new ActionMessage("questionnaire.question.errors.incorrectRegex"));
                saveErrors(request, errors);
                return mapping.getInputForward();
            }
        }

        String redirectUrl = request.getParameter("redirectUrl");
		if ( GenericValidator.isBlankOrNull(redirectUrl) ) {
			redirectUrl = (String) request.getAttribute(WebappConstants.REDIRECT_URL_KEY);
		}
		if ( !GenericValidator.isBlankOrNull(redirectUrl) ) {
			request.getSession().setAttribute(WebappConstants.REDIRECT_URL_KEY, redirectUrl);
		} else {
			request.getSession().removeAttribute(WebappConstants.REDIRECT_URL_KEY);
		}

		if ( !"current".equals(localesMode) && !"all".equals(localesMode) ) {
			localesMode = "selected";
		}
		questionForm.setLocalesMode(localesMode);

		List contentLocales = LocaleUtil.getInstance(servlet.getServletContext()).getEnabledLocales();

		request.getSession().setAttribute(WebappConstants.CONTENT_LOCALES_COLLECTION_KEY, contentLocales);

		// save transaction token in request
		saveToken(request);
		return mapping.findForward("createQuestionTitle");
	}
}
